1、April 2012 Translation by DIN-Sprachendienst.English price group 13No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS
2、77.140.75!$h“1885969www.din.deDDIN EN 10294-2Hollow bars for machining Technical delivery conditions Part 2: Stainless steels with specified machinability propertiesEnglish translation of DIN EN 10294-2:2012-04Stahlrohre fr die spanende Bearbeitung (Drehteilrohre) Technische Lieferbedingungen Teil 2
3、: Nichtrostende Sthle mit spezifizierten ZerspanungseigenschaftenEnglische bersetzung von DIN EN 10294-2:2012-04Barres creuses pour usinage Conditions techniques de livraison Partie 2: Aciers inoxydables usinabilit spcifieTraduction anglaise de DIN EN 10294-2:2012-04www.beuth.deDocument comprises 28
4、 pagesIn case of doubt, the German-language original shall be considered authoritative.03.12 DIN EN 10294-2:2012-04 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee ECISS/TC 110 “Steel tubes, and iron and steel fittings” (Secretariat:
5、UNI, Italy). The responsible German body involved in its preparation was the Normenausschuss Eisen und Stahl (Iron and Steel Standards Committee), Working Committee NA 021-00-09-07 UA Maschinenbaurohre und Hohlstangen. This European Standard specifies technical delivery conditions for seamless hollo
6、w bars made of stainless steels, with specified machinability properties, intended for the manufacture of engineering components by machining. A corresponding DIN Standard has not been available until now. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 10294-2 February 2012 ICS 77.140.75 Engli
7、sh Version Hollow bars for machining - Technical delivery conditions -Part 2: Stainless steels with specified machinability properties Barres creuses pour usinage - Conditions techniques de livraison - Partie 2: Aciers inoxydables usinabilit spcifie Stahlrohre fr die spanende Bearbeitung (Drehteilro
8、hre) - Technische Lieferbedingungen - Teil 2: Nichtrostende Sthle mit spezifizierten Zerspanungseigenschaften This European Standard was approved by CEN on 16 December 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Europ
9、ean Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions
10、 (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Bel
11、gium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EURO
12、PEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10294-2:2012: EEN 10294-2:20
13、12 (E) 2 Contents Page Foreword 41 Scope 52 Normative references 53 Terms and definitions . 64 Symbols 65 Classification and designation . 75.1 Classification 75.2 Designation 76 Information to be supplied by the purchaser . 76.1 Mandatory information 76.2 Options . 76.3 Example of an order 87 Manuf
14、acturing process . 87.1 Material making process . 87.2 Manufacturing and delivery conditions . 87.2.1 Manufacturing 87.2.2 Delivery conditions 88 Requirements . 98.1 General 98.2 Chemical composition 98.2.1 Cast analysis 98.2.2 Product analysis 98.3 Mechanical properties . 118.4 Corrosion resistance
15、 . 148.5 Machinability 148.5.1 Guaranteed cutting speeds (semi-roughing and finishing) 158.6 Appearance and soundness . 158.6.1 Appearance 158.6.2 Soundness 168.7 Straightness . 168.8 Preparation of ends . 168.9 Dimensions, masses and tolerances . 168.9.1 Outside diameter and inside diameter 168.9.2
16、 Mass 168.9.3 Lengths . 168.9.4 Tolerances 208.9.5 Dimensions achievable after machining . 219 Inspection . 219.1 Type of inspection . 219.2 Inspection documents . 219.2.1 Types of inspection documents . 219.2.2 Content of inspection documents 219.3 Summary of inspection and testing . 2210 Sampling
17、. 2210.1 Test unit 2210.1.1 Number of samples per test unit 2210.2 Preparation of samples and test pieces 2310.2.1 General 2310.2.2 Test piece for the tensile test . 2310.2.3 Test piece for the intergranular corrosion test . 23DIN EN 10294-2:2012-04EN 10294-2:2012 (E) 3 11 Test methods . 2311.1 Chem
18、ical analysis . 2311.2 Tensile test . 2311.3 Dimensional inspection 2311.4 Visual examination 2311.5 Intergranular corrosion test . 2311.6 Non-destructive test 2411.7 Machining data 2411.8 Retests, sorting and reprocessing 2412 Marking . 2413 Temporary corrosion protection 24Annex A (normative) Meth
19、od for establishing machining data . 25DIN EN 10294-2:2012-04 EN 10294-2:2012 (E) 4 Foreword This document (EN 10294-2:2012) has been prepared by Technical Committee ECISS/TC 110 “Steel tubes, and iron and steel fittings”, the secretariat of which is held by UNI. This European Standard shall be give
20、n the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2012, and conflicting national standards shall be withdrawn at the latest by August 2012. Attention is drawn to the possibility that some of the elements of this document may be
21、 the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document differs from ISO 2938, Hollow bars for machining. EN 10294 consists of the following parts, under the general title Hollow bars for machining Technical deliver
22、y conditions: Part 1: Non alloy and alloy steels; Part 2: Stainless steels with specified machinability properties. Another European Standard series covering tubes for mechanical and general engineering purposes are: EN 10297, Seamless circular steel tubes for mechanical and general engineering purp
23、oses - Technical delivery conditions EN 10296, Welded circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this E
24、uropean Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, T
25、urkey and the United Kingdom. DIN EN 10294-2:2012-04EN 10294-2:2012 (E) 5 1 Scope This part of EN 10294 specifies the technical delivery conditions for seamless hollow bars made of austenitic (including creep resisting steels) and austenitic-ferritic (duplex) stainless steels, with specified machina
26、bility properties, intended for the manufacture of engineering components by machining. 2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest
27、edition of the referenced document (including any amendments) applies. EN 10020, Definition and classification of grades of steel EN 10021, General technical delivery conditions for steel products EN 10027-1, Designation systems for steels Part 1: Steel names EN 10027-2, Designation systems for stee
28、ls Part 2: Numerical system EN 10052, Vocabulary of heat treatment terms for ferrous products EN 10088-1, Stainless steels Part 1: List of stainless steels EN 10168, Steel products Inspection documents List of information and description EN 10204, Metallic products Types of inspection documents CEN/
29、TR 10261, Iron and steel Review of available methods of chemical analysis EN 10266, Steel tubes, fittings and structural hollow sections Symbols and definitions of terms for use in product standards EN ISO 377, Steel and steel products Location and preparation of samples and test pieces for mechanic
30、al testing (ISO 377) EN ISO 2566-2, Steel Conversion of elongation values Part 2: Austenitic steels (ISO 2566-2) EN ISO 3651-2, Determination of resistance to intergranular corrosion of stainless steels Part 2: Ferritic, austenitic and ferritic-austenitic (duplex) stainless steels Corrosion test in
31、media containing sulphuric acid (ISO 3651-2) EN ISO 6892-1, Metallic materials Tensile testing Part 1: Method of test at room temperature (ISO 6892-1) EN ISO 10893-10, Non-destructive testing of steel tubes Part 10: Automated full peripheral ultrasonic testing of seamless and welded (except submerge
32、d arc-welded) steel tubes for the detection of longitudinal and/or transverse imperfections (ISO 10893-10) ISO 3685, Tool-life testing with single-point turning tools DIN EN 10294-2:2012-04 EN 10294-2:2012 (E) 6 3 Terms and definitions For the purpose of this document, the terms and definitions give
33、n in EN 10021, EN 10052 and EN 10266 and the following apply. 3.1 hollow bar circular hollow product for machining made by a seamless tube manufacturing process or by drilling a bore into a rolled or forged bar 3.2 guaranteed cutting speed lowest cutting speed guaranteed by the manufacturer to obtai
34、n a specified minimum tool-life time with a fixed set of machining parameters for a certain steel grade 3.3 centring on the outside diameter first chucking is made on the outside diameter and machining is performed on the outside surface and/or on the inside surface 3.4 centring on the inside diamet
35、er first chucking is made on the inside diameter and machining is performed on the outside surface and/or on the inside surface 4 Symbols In addition to (or deviating from) the symbols defined in EN 10266 the following symbols apply: D Outside diameter; d Inside diameter; D(e)Maximum achievable outs
36、ide diameter when centring on the outside diameter; d(e)Minimum achievable inside diameter when centring on the outside diameter; D(i)Maximum achievable outside diameter when centring on the inside diameter; d(i) Minimum achievable inside diameter when centring on the inside diameter; TN Nominal wal
37、l thickness, calculated as the half difference between the nominal outside diameter D and the nominal inside diameter d; vc(Velocity cutting) Cutting speed. DIN EN 10294-2:2012-04EN 10294-2:2012 (E) 7 5 Classification and designation 5.1 Classification According to the classification system in EN 10
38、020 and to their structure, the steel grades in this European Standard are classified as: austenitic stainless steels (corrosion resisting or creep resisting steels); austenitic-ferritic (duplex) stainless steels. For more details see EN 10088-1. 5.2 Designation For hollow bars covered by this part
39、of this European Standard the steel designation consists of: the number of this part of this European Standard (EN 10294-2); plus either: the steel name in accordance with EN 10027-1; or: the steel number allocated in accordance with EN 10027-2. 6 Information to be supplied by the purchaser 6.1 Mand
40、atory information The following information shall be supplied by the purchaser at the time of enquiry and order: a) quantity (mass or total length or number); b) term “hollow bar“; c) hollow bar size code (outside diameter and inside diameter); d) reference to this European Standard (EN 10294-2); e)
41、 steel designation (steel name or steel number) (see 5.2); f) mechanical properties for tubes with wall thicknesses TN 50 mm. 6.2 Options A number of options are specified in this European Standard and these are listed below. In the event that the purchaser does not indicate a wish to implement any
42、of these options at the time of enquiry and order, the hollow bars shall be supplied in accordance with the basic specification (see 6.1). a) product analysis (see 8.2.2); b) corrosion resistance (see 8.4); DIN EN 10294-2:2012-04 EN 10294-2:2012 (E) 8 c) specify the machinability with reference to t
43、he Taylor method (specification of constants and C) (see 8.5); d) special requirements on surface condition, either outside or inside, as specified by the purchaser (see 8.6.1); e) non-destructive testing (see 8.6.2); f) other dimensional requirements (see 8.9.1); g) exact lengths (see 8.9.3). 6.3 E
44、xample of an order 50 tonnes of hollow bars, 140 mm outside and 90 mm inside diameter, in accordance with EN 10294-2, made of steel grade 1.4307 (X2CrNi18-9): 50 t hollow bars 140 X 90 EN 10294-2 1.4307 or 50 t hollow bars 140 X 90 EN 10294-2 X2CrNi18-9 7 Manufacturing process 7.1 Material making pr
45、ocess The steels covered by this European Standard are characterized by their suitability for machining (see 8.5). The material making process is left at the discretion of the manufacturer provided all requirements defined in Clause 8 can be fulfilled with the material produced. 7.2 Manufacturing an
46、d delivery conditions 7.2.1 Manufacturing The hollow bars shall be made by a seamless process or by drilling from round bars. At the discretion of the manufacturer the hollow bars may be hot finished or cold finished. The terms “hot finished“ and “cold finished“ apply to the condition of the hollow
47、bar before it is heat treated in accordance with 7.2.2. 7.2.2 Delivery conditions The hollow bars shall be supplied in the solution annealed condition over their full length in either: reference heat treatment conditions; solution annealed condition obtained directly by extrusion and subsequent rapid cooling provided the mechanical properties, corrosion resistance and other properties are in accordance with this European Standard. All specified mechanical properties shall be met even after a subsequent reference heat treatmen
